3.How do I know the quality is up to the OEM standards?/What's your quality guarantee?

OEM is available. We have passed the ISO 9001-2008 and BV certificate, and we have been cooperating with many companies in America, our products have passed their test. Or you can test our products by trial order. We have our own mould and drawing for the Goulds 3196 and Durco mark 3 pump parts.